U113D

U113D-LOST COMMUNICATION WITH MASTER POWER WINDOW SWITCH

For a complete wiring diagram, refer to the Wiring Information.





- When Monitored:
Whenever the module is awake.

- Set Condition:
When one or both door modules have lost communication with the Driver Window/Door Lock Switch, this code will set.





1. TEST FOR INTERMITTENT CONDITION

NOTE: Make sure the battery is fully charged before proceeding.

1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Try to operate the Front Windows up and down several times.
4. Wait 30 seconds.
5. With the scan tool, read the DTCs.

Does the scan tool display; U113D-LOST COMMUNICATION WITH MASTER POWER WINDOW SWITCH?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and poor pin fit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (F981) IGNITION SWITCH OUTPUT CIRCUIT OPEN

NOTE: Make sure Circuit Breaker 2 in the Junction Block is good before proceeding.





1. With the scan tool, erase the DTCs.
2. Turn the ignition off.
3. Disconnect the Driver Window/Door Lock Switch harness connector.
4. Turn the ignition on.
5. Using a 12-volt test light connected to Ground, check the (F981) Ignition Switch Output circuit in the Driver Window/Door Lock Switch harness connector.

Does the test light illuminate brightly?

Yes

- Go To 3

No

- Repair the open in the (F981) Ignition Switch Output circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. CHECK THE LIN BUS CIRCUIT




1. Turn the ignition off.
2. Turn the ignition on.
3. Measure the voltage between the (D903) Driver Door LIN Bus circuit and the (D512) Driver Door LIN Bus Return circuit.

Is the voltage above 8.0 volts?

Yes

- Go To 4

No

- Go To 5

4. (D903) DRIVER DOOR LIN BUS CIRCUIT SHORT TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the Driver Door Module C5 harness connector.
3. Turn the ignition on.
4. Measure the voltage between Ground and the (D903) Driver Door LIN Bus circuit.

Is there any voltage present?

Yes

- Repair the (D903) Driver Door LIN Bus circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Driver Window/Door Lock Switch. Power Window Switch - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. (D512) DRIVER DOOR LIN BUS RETURN CIRCUIT OPEN




1. Using a 12-volt test light connected to 12-volts, check the (D512) Driver Door LIN Bus Return circuit in the Window Switch harness connector.

Does the test light illuminate brightly?

Yes

- Go To 6

No

- Repair the (D512) Driver Door LIN Bus Return circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

6. (D903) DRIVER DOOR LIN BUS CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Disconnect the Driver Door Module C5 harness connector.
3. Measure the resistance between Ground and the (D903) Driver Door LIN Bus circuit in the Door Module C5 harness connector.

Is the resistance below 10K Ohms?

Yes

- Repair the short to the ground in the (D903) Driver Door LIN Bus circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 7

7. (D903) DRIVER DOOR LIN BUS CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition on.
2. Measure the voltage between Ground and the (D903) Driver Door LIN Bus circuit in the Door Module C5 harness connector.

Is there any voltage present?

Yes

- Repair the short to voltage in the (D903) LIN Bus circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 8

8. (D903) DRIVER DOOR LIN BUS CIRCUIT OPEN




1. Turn the ignition off.
2. Measure the resistance of the (D903) Driver Door LIN Bus circuit between the Door Module C5 harness connector and the Driver Window/Door Lock Switch harness connector.

Is the resistance below 2.0 Ohms?

No

- Repair the (D903) Driver Door LIN Bus circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

- Replace the Driver Door Module. Door Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.